单项选择题


A．believable
B．useable
C．practical
D．available
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单项选择题
The football player had studied economics in the university for ______ of roughly six years.
A．a decade
B．a time
C．an age
D．a period
单项选择题
A．showedB．showsC．showD．had shown
A．showed
B．shows
C．show
D．had shown
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